Wait a little bit and try a new autodiscover check; you should now have OAB URL parameter and value.

http://blog.hametbenoit.info/Lists/Posts/Post.aspx?ID=443

I recently saw the same problem at a Customer...no OAB URL in Autodiscover.Looking around a bit, I noticed that WebDistributionEnabled was set to $False which was very odd since that is value that can't be changed and the OAB was missing many of the Virtualdirectories (This was 5 Multi-Role Servers).